hatch



(No Model.) 2 sheets- Sheet 14 J. W. HATCH.

PURNAGB.

No. 423,926. T 1.33, nted Mar. 25, 1.890.

l' l 1 1@ l 'jv/WM?? (No Modem Y 2 sheets-sheet 2.

J. W. HATGH. f

FURNAGE.

N0. 423 26. l Patented Mal. 25, 1890.

UNITED STATES PATENT OEEICE.

JESSE V. HATCH, OF ROCHESTER, NEW YORK, ASSIGNOR TO CLARKS COKING AND SMOKELESS FURNACE COMPANY, OF SAME PLACE.

FU RNACE.

SPECIFICATION forming part of Letters Patent No. 423,926, dated March 25, 1890.

Application tiled July 20, 1889 Serial No. 318,164. (No model.)

T0 all whom it may concern:

Be it known that I, JESSE W. HATCH, of Rochester, county of Monroe, State of New York, have invented an Improvement in Furnaces, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

This invention relates to furnacesV of that class in which soft or bituminous coal is used as a fuel and the volatile products driven off from the coal in one chamber are caused to pass up through the grate-bars of a second chamber, where they are completely consumed.

My invention has for its object to provide a furnace of the class referred to which shall be simple in construction yet most efficient in operation.

In accordance with my invention the furnace is provided with a central wall having at its front end an archway by which communication is established between the chambers on opposite sides of the central wall, the top or arch of the said way being preferably made as a hollow metal casting, provided on Y one side with perforations oropenings,through which air, admitted into the hollow casting at its front end, may pass into one of the said chambers, the said metal casting being supported on its under side by an arch of firebrick. i

My invention therefore consists, in a furnace, of the combination, with a transverse wall forming with the rear wall of the furnace a flue, of a longitudinal wall ext-ended from the front of the furnace to the trans-` nace embodying my invention, the section being taken on line x x, Fig. 2; Fig. 2, a longitudinal section and elevation of the furnace shown in Fig. l on line 0c 00', the boiler being in elevation; Fig. 3,a longitudinal section of the furnace shown in Fig. l on line m2 002 ,the boiler being in elevation; and Fig. 4, a transverse section of the furnace on the irregular line .r3 ons, Fig. 3.

The furnace A, which may be made of brick or other usual material, is provided at its rear end with a transverse wall A2,'which supports the rear end of a boiler A the front end of the boiler being suitably supported by the front wall of the furnace, the transverse Wall A2 forming with the rear wall of the furnace a iiue or passage a.

The furnace A is provided with a longitudinal wall a', extended from the front wall of the furnace to the transverse wall A2, the said longitudinal wall constituting a middle support for the boiler A and forming with the walls of the furnace two chambers a2 a3, provided with a bridge-wall a4, and having at their front ends grate-bars a5 a, respectively. The chamber a2 at the rear of the bridge-wall a4 communicates by a passage h with a chamber b', forming part of the chamber a3, but divided therefrom by a roof, preferably made of slabs or tiles b2, (see Figs. 3 and 4,) the cham! ber b communicating with the main chamber a3 below the grate-bars as by means of a passage b* in the bridge-wall. The chamber as above the roof b2 communicates with the rear flue a by a passage h5 in the transverse wall A2. The longitudinal wall a at its front end is provided with an archway b, having its top preferably made as a hollow metal casting 197, supported upon an arch Z219 of {irebrick, by which the metal casting is prevented from being burned out, the said casting communicating at its front end with the atmosphere, it being provided with a suitable damper or door D8 to control the admission of air into it. The side of the hollow casting D7 adjacent to the chamber a3 is provided with perforations c, and at the rear end of the hollow casting the perforated side forms with the bridge-wall a passage c', through which the heated air may pass into the chamber ai.

In operation the chamber d2 contains the fuel to be burned, and the chamber a3 will preferably contain a layer of ashes or cinders laidV upon its grate-bars a to retard the passage of the volatile products driven off from the fuel in the chamber a2. The bituminous or other coal placed upon the grate-bars a in the chamber a2 is ignited therein, and the volatile products pass from said chamber through the passage b in the central wall into the chamber b', thence through the passage b* in the bridge-wall c4, and up through the grate-bars a in the chamber a3, which, for sake of argument, may be called the combustion-chamber,7 as a complete combustion of the volatile products takes place in the said chamber above the grate-bars, the said volatile products being connningled with the heated air issuing from the perforations c in the hollow casting and from the passage c', the products of combustion passing from the combustion-chamber a3 through the passage b5 in the transverse wall A into the flue a,

' and thence through the boiler to the chimney.

The flame caused by the ignition of the coal in the chamber a2 may pass through the archway 126 in the central wall into the chamber a3 to assist the combustion.

In practice the longitudinal wall a will preferably be located in the furnace on one side of the center line, it being shown as located so as to divide the furnace into thirds, so that substantially two-thirds of the grate area of the furnace may be used as a fuelchamber and but one-third as a combustionchamber.

I prefer to make the top of the archway U7' as a hollow iron casting, supported on its under side by an arch b1 of fire-brick or other refractory material, and provided with perforations, through which air admitted into the l hollow casting maypass into the combustionpassage or aichway, provided with perfora-` tions c and communicating with the atmosphere, substantially as described.

3. In a furnace, the combination, with the transverse wall forming with the rear wall of the furnace a fiue a, of a longitudinal wall a', to divide the furnace into two chambers, a passage or archway in said wall at its front end to connect the said chambers, a bridgewall at the rear of said passage,`a`"topv or roof in one chamber at the rear of the said bridgewall to form a chamber b', a passage in the bridge-wall to connect said chamber with the combustion-chamber below the gratebars, and a passage in the longitudinal wall at the rear of the bridge-wall to connect the fuelchamber with the chamber b', substantially as described.

4. In a furnace, the combination, with a transverse wall forming with the rear wall of the furnace a flue a, of a longitudinal wall a', to divide the furnace into a fuel-chamber and a combustion-chamber, grate-bars in said chambers, a passage connecting the fuelchamber with the combustion-chamber below the grate-bar, and an archway or passage connecting said chambers above the grate-bars, and a hollow metallic arch or top for said passage or archwa-y, provided with perforations c and communicating with the atmosphere, and an arch D, of refractory material, on the under side of said casting, substantially as described.

In testimony whereof I have signed my naine to this specification in the presencei of two subscribing witnesses.

JESSE HATCH. \Vitnesse.:

EDWARD WEBSTER, ROY C. WEBSTER.

IOO 

